...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Brain Research >Building anticipatory postural adjustment during childhood: a kinematic and electromyographic analysis of unloading in children from 4 to 8 years of age
【24h】

Building anticipatory postural adjustment during childhood: a kinematic and electromyographic analysis of unloading in children from 4 to 8 years of age

机译：在儿童时期建立预期的姿势调整：4到8岁儿童卸载的运动学和肌电图分析

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The present study addressed the question of how do anticipatory postural adjustments (APA) develop during childhood, in the range from 4 to 8 years, during a bimanual load-lifting task. This task required maintaining the stabilisation of the forearm position despite imposed or voluntary unloading of the forearm. Elbow angle and multiple surface EMG were recorded on the child postural forearm supporting a load. During voluntary unloading, the elbow flexion of the postural forearm was calculated as a percentage of the elbow flexion measured during the imposed situation. Improvement of the forearm stabilisation was observed mainly between 4–6 and 7–8 years of age, but the oldest children did not reach the adult level of stabilisation of the postural forearm. Moreover, a clear developmental sequence in the acquisition of APA was reported: first the selection of an efficient EMG pattern underlying the forearm stabilisation, and second the mastering of timing adjustments. In fact, regression of the co-contraction pattern was observed with age, together with selection of the adult-like reciprocal pattern. Mastering of the timing adjustments of the reciprocal pattern, characterised in adults by a well-synchronised co-ordination between onset of the flexor muscle contraction of the manual arm and onset of the flexor muscle inhibition of the postural forearm, progressively improves during development. Moreover, these results suggest that the internal representation of the consequences of unloading on the forearm stabilisation, underlying anticipatory function during a bimanual co-ordination task, slowly build up during childhood.
机译：本研究解决了在双向举重任务中，在4至8岁的儿童期中预期姿势调整（APA）如何发展的问题。尽管强行或自愿卸下前臂，该任务仍需要保持前臂位置的稳定。在支撑姿势的儿童姿势前臂上记录肘角度和多表面肌电图。在自愿卸载过程中，将姿势前臂的肘部屈曲计算为施加情况下测得的肘部屈曲的百分比。主要在4-6至7-8岁之间观察到前臂稳定性的改善，但年龄最大的孩子并未达到姿势前臂的成年人稳定水平。此外，据报道在获得APA方面有明确的发展顺序：首先选择前臂稳定基础的有效EMG模式，其次掌握时序调整。实际上，随着年龄的增长，共收缩模式的消退以及成年后倒数模式的选择被观察到。掌握对等模式的时间调整，其特点是在成年人中，在发育过程中，手腕屈肌收缩的发作与姿势前臂屈肌抑制的发作之间的同步非常协调。此外，这些结果表明，卸载对前臂稳定的后果的内部表示（在双手协调任务中潜在的预期功能）在儿童时期逐渐建立。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号